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Voice to Vision XI : Cam Tu Nguyen "Whirlpool"
No full textUniversity of Minnesota Center for Holocaust and Genocide Studies. University of Minnesota Department of Art. Video run time: 9 minutes, 02 seconds.Feinberg, David; Andrews, Beth; Anton, Kristin; Nguyen, Cam Tu; Phan, Kha-Tu. (2017). Voice to Vision XI : Cam Tu Nguyen "Whirlpool". Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/194524
Oral History of Tu Nguyen
No full textAn oral history with Ms. Tu Nguyen, born in 1988 in Vietnam. Her father fled to Malaysia as a boat person when she was young but came back to Vietnam around the year 1995. Her whole family—both parents, three sisters and four brothers—moved to the US around the year 1997, through the refugee program arranged by the UN, supported by her aunt living in Chicago. She spent her teenage years in Chicago, dropped out of high school, and studied in the community college in Chicago from 2009. She moves to San Diego, California in 2011, mainly because of her partner at the time. She went to the community college there, too. She went to the University of California, Irvine in 2013, and starts her art practice there. She currently lives in Long Beach, California, working as a videographer in a company, while working as a conceptual artist at the same time.Recorded digitall
Morpho-anatomical study of Sargassum (Fucales, Phaeophyceae) diversity reveals noteworthy collections and range extensions from southwestern Vietnam
No full textTu, Nguyen Van (2023): Morpho-anatomical study of Sargassum (Fucales, Phaeophyceae) diversity reveals noteworthy collections and range extensions from southwestern Vietnam. Phytotaxa 600 (5): 281-290, DOI: 10.11646/phytotaxa.600.5.3, URL: http://dx.doi.org/10.11646/phytotaxa.600.5.
Litinium quangi Tchesunov, Nguyen Dinh Tu & Nguyen Vu Thanh, sp. n.
No full textLitinium quangi Tchesunov, Nguyen Dinh Tu & Nguyen Vu Thanh sp. n. Figs 1, 2, Table 1 Material. Holotype male, three paratype males, allotype female and paratype female. All the specimens are deposited in the Vietnam National Museum of Nature (18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam) with slide numbers VNMN.0011 (holotype male, paratype male 3 and allotype female), VNMN.0012 (paratype male 1 and paratype female 1) and VNMN.0013 (paratype male 2). Locality. South Vietnam coast, Dong Nai River Delta, Can Gio National Reserve, 10 ° 32 ' 176 ''N and 106 ° 45 ' 919 ''E, 0.5 m deep. Sediment consisted of silt and clay (80.5 %) and sand (19.5 %). NaCl content 13.5 ‰. Description. Body very long and slender, filiform. Cuticle thick, smooth over entire body. Head slightly separated off by a very slight narrowing at the level of the cephalic setae. Cuticle anterior to the amphideal fovea 1–1.3 µ m thick, posterior to the amphideal fovea 1.6–2 µ m, posterior to the cardia 2–3.4 µ m, tail terminal cuticle 3.9–4.2 µ m. Six inner labial and six outer labial sensilla equal in length and shape. Both circles united in a joint crown of twelve short setae where outer labial setae situated just posterior to inner labial setae. Four equally short cephalic setae situated separately just posterior to the amphideal foveas in area of postcephalic narrowing. Amphideal fovea large, longitudinally ovoid, with distinct cuticularised horseshoe-shaped fringe; aperture round, with very fine rim, located at anterior end of fovea. A few short ventral, subventral and lateral papillae and tiny setae situated posterior to the amphideal fovea, anterior to the excretory pore, at 62–67 µ m from anterior end. A very minute midventral seta about 1 Μ m long present 10–12 Μ m anterior to the ventral pore. No metanemes found. Mouth opening tiny. Buccal cavity not developed as such and its walls not differentiated from the cuticular lining of the pharynx. Pharynx evenly muscular and slender throughout its length but widening gradually to the posterior end. Cardia widely conical and surrounded by intestinal tissue. Midgut lumen is partially filled with mass of fine granular material. Ventral pore at about half distance from anterior end to the nerve ring, and posterior to the midventral seta. Only anterior portion of ventral gland duct discernible. Vulva situated at ~ one fifth of body length from anterior end. Single posterior antidromously reflected ovary disposed ventrally and slightly to the left of the intestine. Uterus elongate and voluminous; uterus empty in both females examined. A short spermatheca just posterior to the uterus filled densely with minute round spermatozoa. Only anterior male gonad present, situated ventrally to the intestine. Spicules short, flat, arcuate, with internal cuticular linear longitudinal stripes, with posterior ends pointed and anterior ends slightly narrowed. One short (0.8–2, µ m long) midventral precloacal seta present, just anterior to the anterior ends of the spicules, 32–35 µ m from the cloacal opening. Tail very short, rounded. Terminal pore and canal well developed, slightly subterminal. A pair of short subventral seta mid-tail length in both males and females; one ventral papilloid sensilla situated at mid-tail length discernible in some specimens. Diagnosis. Litinium. Body length 2523–2918 µ m; a 81–118; c 72.1–97.2; c' 1.12–1.63. Inner labial, outer labial, cephalic setae very short, 1.4–2.6 µ m. Amphideal fovea ovoid in outline, with horseshoe-shaped cuticular rim. Cephalic setae at level of posterior end of the amphideal fovea. One precloacal midventral supplementary seta at level of anterior endof the spicules. Character Specimens Differential diagnosis. Litinium quangi sp. n. shares the ovoid shape of the amphideal fovea having a small round aperture with L. aequale, L. curticauda, L. parmatum, L. subterraneum and Litinium sp. 1 of Quang et al. (2008) but other known species have a fovea shaped as a half moon. Litinium quangi differs from all species by having only one midventral preanal seta instead of two or more setae. The female of L. quangi differs from L. parmatum with unknown males by having smaller anterior sensilla (1.1–2.5 vs 18 µ m) and a shorter rounded tail (c' 1.12 vs 4.2, conical tail). Litinium quangi differs from the most similar and sympatric species L. sp. 1 of Quang et al. (2008) by having shorter outer labial and cephalic setae (respectively, 2.1–2.6 µ m and 1.4–2.2 µ m vs 5.2 µ m and 4.4 µ m) and one vs two midventral precloacal setae. Litinium guangi differs from L. curticauda in the number of precloacal supplementary setae and by the greater distance from the head apex to the ventral pore (68–75 µ m vs 39.5–48 µ m), shorter spicules (30–33 µ m vs 43–49 µ m), slightly longer tail (c 72.1–94.1 and c ' 1.36–1.63 vs 110–119 and 0.83–0.94, respectively). Etymology. Species name is given in honour of Dr. Quang Ngo Xuan, the first author of the paper describing several Oxystominidae species from the Can Gio mangrove forest where two unnamed Litinium species were collected.Published as part of Tchesunov, Alexei V., Thanh, Nguyen Vu & Tu, Nguyen Dinh, 2014, A review of the genus Litinium Cobb, 1920 (Nematoda: Enoplida: Oxystominidae) with descriptions of four new species from two contrasting habitats, pp. 57-74 in Zootaxa 3872 (1) on pages 60-64, DOI: 10.11646/zootaxa.3872.1.5, http://zenodo.org/record/28722
FIGURE 1 in Morpho-anatomical study of Sargassum (Fucales, Phaeophyceae) diversity reveals noteworthy collections and range extensions from southwestern Vietnam
No full textFIGURE 1. Collection sites of Sargassum from the Phu Quoc Island and nearby localities, southwestern Vietnam.Published as part of Tu, Nguyen Van, 2023, Morpho-anatomical study of Sargassum (Fucales, Phaeophyceae) diversity reveals noteworthy collections and range extensions from southwestern Vietnam, pp. 281-290 in Phytotaxa 600 (5) on page 282, DOI: 10.11646/phytotaxa.600.5.3, http://zenodo.org/record/812937
Litinium curticauda Tchesunov, Nguyen Dinh Tu & Nguyen Vu Thanh, sp. n.
No full textLitinium curticauda Tchesunov, Nguyen Dinh Tu & Nguyen Vu Thanh sp. n. Fig. 3, Table 2 Quang Ngo Xuan et al., 2008: 7–9, fig. 4 (Litinium sp. 2) Material. One holotype male. The specimen is deposited in Vietnam National Museum of Nature (18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam) with the slide number VNMN.0010. Locality. South Vietnam coast, Dong Nai River Delta, Can Gio National Reserve. 10 ° 32 ' 176 ''N and 106 ° 45 ' 919 ''E, 0.5 m deep. Sediment consisted of silt and clay (80.5 %) and sand (19.5 %). NaCl content 13.5 ‰. Description of the holotype. Body long, cylindrical, gradually attenuated from the cardia level to the anterior cephalic apex. Cuticle very thick and smooth over the entire body. Cuticle anterior to the amphideal fovea 1.6 µ m thick, posterior to the amphideal fovea 2.5 µ m, posterior to the cardia 2.6 µ m, tail terminal cuticle 4.7 µ m. Both six inner and six outer labial sensilla united in a crown of twelve equal, short setae situated about 2.5 µ m from the cephalic apex. Four very short cephalic setae situated posterior to the anterior crown of setae at the level of the posterior margin of the amphideal pouch. Each cephalic seta implanted in anterior end of a longitudinal ‘slit’ in the cuticle. Amphideal fovea rather large, situated between the crown of the inner plus outer setae and the cephalic setae. The amphideal fovea longitudinally ovoid in shape, with a distinct peripheral cuticular ridge surrounded the fovea anteriorly and laterally but not posteriorly. Amphideal aperture transversally oval, at the anterior end of the fovea. Some minute papillae scattered along lateral sides of the preneural body. Distinct midventral excretory pore with a thin duct situated at a quarter of the distance from the cephalic apex to the nerve ring. Apparently part of a ventral gland; neck however only traced a short distance posterior; cell body not clear. A second less distinct midventral pore with a thin intracuticular canal but without any signs of a duct is present; situated 27 µ m posterior to the anterior ventral pore. Mouth opening tiny and structurally simple, evidently lipless. Buccal cavity not developed, anteriormost internal cuticle thin and not differing from the following cuticular lining of the pharynx. For most of its length, pharynx is slender, with barely discernible transverse striation. At the posterior end, the pharynx widens and has clear transverse muscular striations. Cardia short, semicircular and surrounded by intestinal tissue. Internal canal of the cardia thin and straight. Internal lumen of the midgut filled partly with fine granular non-refractive material. Anterior testis with distinct longitudinal fibres (spermatozoa?), situated to the right of the intestine. Posterior testis absent. Spicules short and slightly arcuate, broad, with internal longitudinal stripes, with both anterior and posterior spicule ends pointed. Gubernaculum comprises a pair of short cuticular bars. Two short midventral precloacal supplementary setae: anterior one at the level of the posterior end of the spicules, 39 µ m from the cloaca, posterior one just anterior to the cloacal opening, 5 µ m from the cloaca. Both precloacal midventral setae 1.7 µ m long. Distinct bursal musculature in the tail. Tail very short and terminally rounded, cuticle terminally slightly thickened. Spinneret not apparent as such except for a thin subterminal intracuticular canal. Two (one lateral and one latero-dorsal) papillae on the tail. Remark. The specimen described above is evidently conspecific with the male denoted as Litinium sp. 2 by Quang et al. (2008). Dimensions of both males are presented in Table 3. Diagnosis. Litinium. Body length 2866–3431 µ m, a 63–67.6, c 110–119, c' 0.83–0.94. Inner labial, outer labial setae short, 1.4–1.5 µ m, cephalic setae 1.5–2.1 µ m. Amphideal fovea ovoid in outline, with horseshoe-shaped cuticular rim. Cephalic setae at the level of the posterior end of the amphideal fovea. Two midventral supplementary setae, anterior one situated at the level of anterior tips of the spicules, posterior one just anterior to the cloacal opening. Differential diagnosis. Litinium curticauda sp. n. belongs to a group of species having ovoid amphideal fovea with round to oval anterior apertures (L. aequale, L. parmatum, L. quangi, L. subterraneum). The new species differs from L. parmatum and L. subterraneum in having a short rounded tail (c' 0.83–0.94 vs 4.2, 3.47–3.48, respectively), from L. aequale, L. parmatum, L. subterraneum with shorter anterior sensilla (1.4–1.5 µ m vs 9–10 µ m, 6.9–18 µ m, 2.5–4 µ m, respectively). The species most similar to L. curticauda is the sympatric L. quangi; differing from it by having two precloacal setae instead one, index a (63–67.6 vs 103–118), c' (0.83–0.94 vs 1.36–1.63), distance from the cephalic apex to the ventral pore (39.5–48 µ m vs 68–75 µ m), and length of spicules (46.5–49 µ m vs 30–33 µ m). Etymology. Species name means 'short tail'.Published as part of Tchesunov, Alexei V., Thanh, Nguyen Vu & Tu, Nguyen Dinh, 2014, A review of the genus Litinium Cobb, 1920 (Nematoda: Enoplida: Oxystominidae) with descriptions of four new species from two contrasting habitats, pp. 57-74 in Zootaxa 3872 (1) on pages 64-66, DOI: 10.11646/zootaxa.3872.1.5, http://zenodo.org/record/28722
Litinium abyssorum Tchesunov, Nguyen Dinh Tu, Nguyen Vu Thanh, sp. n.
No full textLitinium abyssorum Tchesunov, Nguyen Dinh Tu, Nguyen Vu Thanh sp. n. Fig. 4, Table 3 Material. One holotype male and one allotype female. The specimens are deposited in the Senckenberg Natural History Museum (Frankfurt am Main, Germany) with slide numbers SMF 16981 (holotype male) and SMF 16982 (allotype female). Locality. South-east Atlantic Ocean, Angola Basin, 16 °17.0'S, 005°27.0'E, depth 5389 m, silt—total carbon content 0.62 %, mud content 95.23 %, chlorophyll–a content 1.67 µ g/g. DIVA–I expedition, st. 346 / 2, Multicorer 3; 27 July 2000. Description. Body slim, cylindrical. Cuticle smooth and evenly thick (about 2 µ m) over entire body. Anterior end shaped as truncated cone; ratio of body diameter at the level of inner labial setae to that of the cephalic setae is 2 in the male and 1.8 in the female. There are two circles of six setae (inner labial setae and outer labial setae), consecutive but close to each other. The setae of both circles slender and cylindrical, nearly equal in length. Distance from the apex to the inner labial setae 2 µ m in the male and 7 µ m in the female. Circle of four cephalic setae situated posterior to the amphideal fovea, far posterior to the circle of outer labial setae; cephalic setae slender cylindrical and slightly shorter than setae of the two anterior circles. Amphideal fovea in male large, rounded in outer outline, with deep sinuous invagination on the surface at the anterior edge. Amphideal nerve emerges as broad funnel from beneath the posterior amphideal fovea. Amphideal fovea in female shaped in outline as an upside-down pear, with a small groove on its anterior edge; posterior smaller lobe of the fovea set off with a constriction. A number of minute somatic sensilla distributed sublaterally along the; each inserted in the middle of a short longitudinal ‘slit’ in the cuticle. Mouth opening tiny. Somatic cuticle thickened slightly around the mouth opening. Buccal cavity not developed as such (internal lumen of the anterior pharynx not enlarged), but internal lining of the anterior pharynx thickened and cuticularised forming a narrow buccal capsule 13 µ m long in the male and 15 µ m long in the female. Pharynx gradually widening to the cardia; with clear internal cuticular lining; no muscular cross striation apparent in pharynx. Nerve ring not seen. Ventral gland not visible. Testes not discernible. A midventral seta 2 µ m long 2 µ m anterior to the cloacal opening. No precloacal midventral supplementary papillae. Right spicule short, weak, slightly curved, with slightly curved anterior handle. Left spicule reduced to a short straight rod-like structure with its pointed tip directed dorsally. Gubernaculum a short bar parallel to the spicule at its posterior part. One posterior ovary antidromously reflexed and situated on the right of the intestine. Vulva depressed, surrounded by thickened cuticle. Tail cylindrical, with rounded tip. There is a terminal pore, thin canal and coiling ducts of caudal glands with light transparent content. Caudal gland cell bodies with nuclei not visible. There is a minute lateroventral subterminal papilla on either side of the tail. Diagnosis. Litinium. Body length 710–897 µ m; a 50.7–69; c 13.3–15.7; c' 3.61–5.76. Inner labial, outer labial, cephalic setae 2.5–4 µ m in length. Amphideal fovea large, with deep anterior sinuous invagination of the external contour. Cephalic setae posterior to the amphideal fovea. One precloacal midventral supplementary seta just anterior to cloacal vent. Spicules unequal, the left spicule vestigial. Differential diagnosis. Litinium abyssorum sp. n. differs from all other Litinium species with known males by having unequal spicules. Further, L. abyssorum sp. n. has a peculiar amphideal fovea with deep anterior invagination similar to those of L. bananum, L. volutum, L. obtusilobus and L. profundorum. Litinium abyssorum differs from L. bananum by smaller body length (710–897 µ m vs 2140–3225 µ m, shorter anterior setae (2.5–4 µ m vs 10–14 µ m), presence vs apparent absence of precloacal midventral seta; from L. volutum by simpler shape of the amphideal fovea without curls, one vs four preanal papillae in male and longer tail (c ' 5.76 vs 1.5, in females), from L. profundorum by longer tail (c 15.7 vs 40.6 and c' 3.6 vs 1.2) and two vs one precloacal midventral setae, from L. obtusilobus by short cephalic setae (2.5 µ m vs 5 µ m) and relatively longer tail (c' 5.8 vs 1.5). Etymology. Species name is derived from Hellenic "abyssus" (abyss, chasm).Published as part of Tchesunov, Alexei V., Thanh, Nguyen Vu & Tu, Nguyen Dinh, 2014, A review of the genus Litinium Cobb, 1920 (Nematoda: Enoplida: Oxystominidae) with descriptions of four new species from two contrasting habitats, pp. 57-74 in Zootaxa 3872 (1) on pages 66-69, DOI: 10.11646/zootaxa.3872.1.5, http://zenodo.org/record/28722
Paracomesoma minor sp. n. and Microlaimus validus sp. n. (Nematoda) from the coast of Vietnam
No full textGagarin, Vladimir G., Tu, Nguyen Dinh (2014): Paracomesoma minor sp. n. and Microlaimus validus sp. n. (Nematoda) from the coast of Vietnam. Zootaxa 3856 (3): 366-374, DOI: 10.11646/zootaxa.3856.3.
FIGURE 2. A. Sargassum cinereum J.Agardh. A in Morpho-anatomical study of Sargassum (Fucales, Phaeophyceae) diversity reveals noteworthy collections and range extensions from southwestern Vietnam
No full textFIGURE 2. A. Sargassum cinereum J.Agardh. A. Habit of a voucher specimen (NVT2497). B. Holdfast. C. Leaves. D. Vesicle. E. Receptacle. F. Section of male receptacle.Published as part of Tu, Nguyen Van, 2023, Morpho-anatomical study of Sargassum (Fucales, Phaeophyceae) diversity reveals noteworthy collections and range extensions from southwestern Vietnam, pp. 281-290 in Phytotaxa 600 (5) on page 283, DOI: 10.11646/phytotaxa.600.5.3, http://zenodo.org/record/812937
Utilisation of turbidity as an indicator for biochemical and chemical oxygen demand
No full textAbstract not availableLe Anh Tu Nguyen, Andrew James Ward, David Lewi
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